JP5229351B2 - Weft storage device in loom - Google Patents

Description

  The present invention relates to a weft storage device in a loom equipped with a plurality of yarn supplying sections.

  In a weaving loom that inserts wefts in pieces, in order to reduce the weft draw resistance and the variation in draw resistance when wefts are inserted, wefts drawn from the yarn feeding section are stored on the peripheral surface of the drum. A drum-type weft storage method is used for putting. In particular, in a loom for multi-colored fabrics using two or more same or different types of wefts, the same number of weft storage drums as the number of wefts to be used are required. A weft storage drum must be installed. For this reason, there are problems such as an increase in the area occupied by one loom, a complicated configuration of the entire weft storage device, and an increase in cost.

  As a technique for solving the above problems, for example, Patent Document 1 discloses an invention in which wefts are stored using a single rotating drum with respect to a plurality of fixed weft supply units (corresponding to yarn supply units). ing. According to Patent Document 1, the multicolor weft supply device stretches a plurality of wefts in parallel in the vicinity of the outer peripheral surface of a rotating drum that rotates continuously. Prior to the weft insertion operation, the weft to be inserted next is displaced in the axial direction of the rotary drum by the weft guide lever, and is fed out by being anchored to the weft locking pin on the rotary drum, and wound around the rotary drum. Stored.

  A plurality of weft guide levers are installed corresponding to each weft, and each is biased by a spring so as to tilt in the axial direction of the rotating drum, but is always tilted by a solenoid provided for each weft guide lever. It is regulated. When the solenoid of the weft guide lever corresponding to the next weft insertion target is actuated based on the weft insertion signal from the pattern card that determines the fabric structure or woven pattern, the restriction of the weft guide lever is released. The weft guide lever is tilted by a spring, and the weft is wound around the rotating drum and stored in order to guide the weft to be inserted in the next stage to a position where the weft is locked with the weft locking pin on the rotating drum.

JP-A 48-42164

In Patent Document 1, a weft guide lever biased by a spring is configured to tilt or return by restriction or release based on the operation of a solenoid. For this reason, there is a problem that the solenoid operation time based on the weft insertion signal from the pattern card is likely to vary, and the weft storage amount varies. Further, since the weft guide lever is configured to tilt by the urging force of the spring, the operation of mooring the weft to the weft locking pin on the rotating drum is likely to be unstable due to the influence of vibration or the like due to the operation of the loom. These problems are likely to occur remarkably in the operation of a loom at a high speed (for example, 600 to 700 rpm or more).
Further, in Patent Document 1, the above-mentioned problem can be solved by directly tilting or returning the weft guide lever by a mechanical drive mechanism such as a cam mechanism. In this case, however, every time the weft insertion pattern is changed. The corresponding drive mechanism must be replaced and lacks versatility.

  The invention of the present application provides a weft storage device capable of reliably locking a weft thread to a weft locking pin of a rotary drum and ensuring versatility in a loom.

  The first aspect includes a plurality of yarn supplying portions, a single rotating drum, and a weft gripping portion that releases and grips the weft at the start and end of weft insertion, and advances and retreats on the outer peripheral surface of the rotary drum. In a weft storage device in a weaving machine that locks the weft thread on a weft locking pin that is arranged and winds and stores the wound thread around the rotary drum, toward the axial center of the rotary drum outward of the rotary drum A plurality of movable weft guide levers, and a cam mechanism for moving the weft guide levers toward an axis of the rotating drum so as to guide the wefts to the weft locking pins; Each of the weft guide levers is provided with a restricting portion that selectively restricts the movement of the weft guide lever by the cam mechanism based on an electrical command.

  According to the first aspect, the operation of the weft guide lever at the timing of guiding the weft to the weft locking pin can be surely performed by the cam mechanism. For this reason, the weft guide lever is not affected by variations in the operation timing of the actuator, and can accurately select the weft to be weft-inserted, wind it around the rotating drum, and store it. Further, by providing a restricting portion that selectively restricts the movement of the weft guide lever by the cam mechanism based on an electrical command, it is possible to ensure versatility that can flexibly cope with the change of the weft insertion pattern.

  According to a second aspect of the present invention, the restricting portion includes a solenoid mechanism that maintains a position where the weft guide lever is separated from the rotating drum, and the cam mechanism attaches the weft guide lever toward an axis of the rotating drum. And a cam follower that comes into contact with the cam, and the cam is moved toward the axis of the rotary drum. And a groove cam portion for maintaining the position of the cam follower corresponding to the above. According to the second aspect of the present invention, there is no possibility that the guide to the weft locking pin is hindered or detached from the weft locking pin because the weft dances due to the influence of the vibration of the loom or the like.

  According to a third aspect of the present invention, the cam includes an introduction opening cam portion that introduces the cam follower into the groove cam portion, and a lead-out opening cam portion that leads the cam follower from the groove cam portion. According to the third aspect, the restriction release of the weft guide lever by the restricting portion and the variation in the restriction timing can be absorbed by the introduction opening cam portion and the outlet opening cam portion of the cam mechanism. For this reason, it becomes easy to set the operation timing of the restricting unit based on the weft insertion signal of the weft insertion pattern created from the fabric structure or the weave pattern.

  According to a fourth aspect of the present invention, the weft locking pin releases the locking of the weft before the amount of the weft necessary for one weft insertion is wound around the outer peripheral surface of the rotating drum. So that the sum of the length of the weft wound around the rotating drum and the length of the weft wound around the rotating drum after unlocking is the length of the weft for one weft insertion, The weft locking pin sets a timing for releasing the locking of the weft. According to the fourth aspect of the present invention, it is more advantageous for higher speed than the case where the weft locking pin is retracted into the rotating drum after the weft of the length necessary for one weft insertion is wound around the rotating drum. It becomes.

  The present invention relates to a loom equipped with a weft storage device that stores a weft using a single rotating drum for a plurality of yarn supplying sections, and securely holds the weft to a weft locking pin of the rotating drum. And versatility can be ensured.

It is a top view which shows the weft storage apparatus of an air jet loom. It is a front view which shows the cam of a weft storage device. FIG. 3 is a view taken along line AA of the cam shown in FIG. 2. It is explanatory drawing which shows the operation | movement relationship between a cam and a cam follower. FIG. 2 is a plan view corresponding to FIG. 1 for explaining a weft storage operation before weft insertion. FIG. 2 is a plan view corresponding to FIG. 1 for explaining a weft storage operation during weft insertion. It is a timing chart explaining the relationship between the weft storage and the weft insertion.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows weft storage in an air jet loom for a multicolor fabric having two weft insertion nozzles 1 and 2 and two yarn feeding sections 3 and 4 that perform weft insertion by jetting air flow as a weft insertion mechanism. The device is shown. On the upstream side of the weft insertion nozzle 1, there are provided a weft grip portion 5 that is operated by a mechanical drive source such as a cam and weft guides 6 and 7 that are arranged with the weft grip portion 5 interposed therebetween. Similarly, on the upstream side of the weft insertion nozzle 2, there are provided the weft grip portion 8 and the weft guides 9 and 10 arranged with the weft grip portion 8 interposed therebetween. The weft gripping portions 5 and 8 open and grip the wefts Y1 and Y2 at the start of weft insertion and at the end of weft insertion. Tensors 11 and 12 are provided in the vicinity of the yarn feeding sections 3 and 4 and support the weft guides by leaf springs. The wefts Y1 and Y2 drawn from the yarn feeding sections 3 and 4 are respectively fed from the tencers 11 and 12 to the weft guide 6. , 7, 9, and 10 to reach the weft insertion nozzles 1 and 2.

  Between the yarn feeding sections 3 and 4 and the weft gripping sections 5 and 8, there is a single rotating drum 13, a cam 14 that can rotate integrally with the rotating drum 13, and two bodies corresponding to the yarn feeding sections 3 and 4. Weft yarn guide levers 15 and 16 are arranged. The rotating drum 13 is formed of a truncated cone-shaped cylinder and is rotated in the direction of the arrow in FIG. 1 via a driven gear 17 and a cylindrical rotating shaft 18 connected to a drive mechanism such as an electric motor (not shown). Inside the rotary drum 13 and the rotary shaft 18, there is provided a drive rod 19 fitted so as to be able to reciprocate in the axial center X direction of the rotary drum 13. The drive rod 19 is driven by mechanical means such as a cam (not shown).

  An L-shaped link 20 is rotatably attached to the inner wall portion of the rotating drum 13. One end of the L-shaped link 20 is connected to the end of the drive rod 19, and the other end of the L-shaped link 20 is configured as a weft locking pin 21 that can advance and retract on the outer peripheral surface 13 </ b> A of the rotary drum 13. The weft locking pin 21 advances onto the outer peripheral surface 13A of the rotary drum 13 as the drive rod 19 moves forward in the axis X direction, and the rotary drum as the drive rod 19 moves backward in the axis X direction. Retreat into 13 Accordingly, the drive rod 19, the L-shaped link 20, and the weft locking pin 21 rotate together with the rotary drum 13 while the weft locking pin 21 moves forward and backward.

  As shown in FIGS. 2 and 3, the cam 14 is constituted by a disc cam 22, and a shaft hole 23 into which the rotating shaft 18 is fitted is formed at the center. The disk cam 22 is formed such that approximately half of the cam surface formed on the peripheral surface is a crest 24 and the remaining half is a trough 25. A groove cam portion 27 covered with a roof 26 concentrically formed with the cam surface is provided at the position of the valley 25 having the smallest diameter. The trough 25 on the side of the rotational direction of the disc cam 22 (see the arrow indicating the rotational direction of the rotating drum in FIG. 1) relative to the groove cam portion 27 is an introduction opening in which the outer circumferential surface of the disc cam 22 is opened. A cam portion 28 is provided, and a lead-out opening cam portion 29 in which the outer circumferential surface of the disc cam 22 is opened is provided in the trough portion 25 on the front side in the rotation direction.

  Since the weft guide levers 15 and 16 have the same structure except for the phase, only the weft guide lever 15 will be described. The reference numerals used in the description of the weft guide lever 15 are used for the description of the weft guide lever 16. The weft guide lever 15 has a main body in which a vertical lever 30 and a horizontal lever 31 are integrated in an L shape, and is provided so as to be movable toward and away from the axis X of the rotary drum 13. . The vertical lever 30 extends toward the cam 14, and the horizontal lever 31 extends so as to be parallel to the axis X outside the outer peripheral surface 13 </ b> A of the rotary drum 13. The weft guide lever 15 is biased by the spring 35 in a direction approaching the axis X.

  The vertical lever 30 includes a cam follower 32 that contacts the cam surface of the disc cam 22 at the lower end, and the horizontal lever 31 includes a thread presser 33 that faces the outer peripheral surface 13 </ b> A of the rotary drum 13. The thread presser 33 is in a state in which the weft guide lever 15 is not slightly in contact with the weft Y1 indicated by the phantom line at the position farthest from the axis X of the rotary drum 13 (the thread presser of the weft guide lever 16 in FIG. 1). 33 and the positional relationship between the weft Y2). Accordingly, the weft Y1 is stopped from being wound around the rotary drum 13. The cam 14, the spring 35, and the cam follower 32 constitute a cam mechanism that moves the weft guide lever 15 toward the axis X of the rotary drum 13.

  A solenoid mechanism 34 as a restricting portion is disposed on the side of the vertical lever 30. The solenoid mechanism 34 performs a regulating operation of the weft guide lever 15 and an opening operation of the weft guide lever 15 according to a command signal from a control unit (not shown). In the restricting operation of the weft guide lever 15, a part of the solenoid mechanism 34 projects by a command signal from the control unit and engages with a part of the vertical lever 30 to restrict the movement of the weft guide lever 15. Accordingly, the weft guide lever 15 is held at a position farthest from the axis X of the rotary drum 13. In the restriction release operation of the weft guide lever 15, a part of the solenoid mechanism 34 is detached from a part of the vertical lever 30 by a command signal from the control unit, and the weft guide lever 15 can be moved.

  The control unit (not shown) is provided with a weft insertion pattern program created based on the woven structure or woven pattern, and the weft insertion nozzles 1 and 2, the weft gripping portions 5, 8 and the weft engagement based on the weft insertion pattern. An operation command signal is transmitted to the pin 21 and the solenoid mechanism 34. Therefore, the solenoid mechanism 34 selectively restricts the movement of the weft guide lever 15 toward the axis X of the rotary drum 13 based on an electrical command from a control unit (not shown). 1 denotes a warp, W denotes a woven fabric, and K denotes a weft cutting device.

  The effect | action in embodiment of this invention is demonstrated based on FIG.1 and FIGS. 4-7. As the weft insertion order, as shown in FIG. 7, the weft Y1 is first inserted and then the weft Y2 is inserted. During operation of the loom, prior to the start of weft insertion of the weft Y1, the drive rod 19 is moved to the right in FIG. 1 by a drive mechanism (not shown), and a storage command signal for the weft Y1 is transmitted from a control unit (not shown). The weft locking pin 21 advances onto the outer peripheral surface 13A of the rotary drum 13. At the same time, the solenoid mechanism 34 is disengaged from the vertical lever 30 by the restriction release operation command, and releases the restriction of the vertical lever 30, that is, the restriction of the weft guide lever 15.

  When the cam follower 32 reaches the cam surface of the introduction opening cam portion 28 of the disc cam 22, the weft guide lever 15 moves toward the axis X of the rotary drum 13 while being guided by the cam surface by the urging force of the spring 35. . In this movement process, the thread presser 33 engages with the weft Y1 at the position of the imaginary line in FIG. 1 and moves the weft Y1 to the outer peripheral surface 13A side of the rotary drum 13. Further, since the cam follower 32 is pressed against the introduction opening cam portion 28 indicated by 32A in FIG. 4, the weft guide lever 15 moves according to the cam surface of the introduction opening cam portion 28. The introduction opening cam portion 28 has a wide operating range of the cam surface. For this reason, the restriction release of the weft guide lever 15 by the solenoid mechanism 34 may be performed within the operating range of the introduction opening cam portion 28, and the degree of freedom of timing setting is increased. Further, the variation in the restriction release timing generated in the solenoid mechanism 34 can be absorbed by the introduction opening cam portion 28.

  When the cam follower 32 is introduced into the groove cam portion 27 (see 32B in FIG. 4), the weft guide lever 15 moves to a position (see FIG. 1) indicated by a solid line where the weft Y1 can be engaged with the weft locking pin 21. To do. Since the moving position of the weft guide lever 15 is maintained by the groove cam portion 27 and is kept stable without being affected by the vibration of the loom (see 32C in FIG. 4), the weft Y1 is surely secured by the weft locking pin 21. The winding onto the rotary drum 13 is started.

  When the winding of the weft Y1 is started, the cam follower 32 reaches the position 32D in FIG. 4 in the groove cam portion 27 and is led out to the lead-out opening cam portion 29. Accordingly, the weft guide lever 15 is moved in the direction away from the axis X of the rotary drum 13 by the cam surface of the outlet opening cam portion 29 (see 32E in FIG. 4).

  Since the cam follower 32 further reaches the peak portion 24 from the lead-out opening cam portion 29 (see 32F in FIG. 4), the weft guide lever 15 is located farthest from the axis X of the rotary drum 13 by the cam surface of the peak portion 24. Maintained (see solid line position in FIG. 6). In this state, a restriction operation command is transmitted to the solenoid mechanism 34 from a control unit (not shown). Since the solenoid mechanism 34 engages with the vertical lever 30 and restricts the movement of the vertical lever 30, the weft guide lever 15 is held at the position in the standby state farthest from the shaft center X for the next winding and storage action. Prepare.

  On the other hand, when the weft Y1 is wound and stored, and when the weft Y1 is stored for a predetermined length less than the length required for one weft insertion, the weft locking pin 21 is moved by a driving mechanism (not shown). The weft gripping portion 5 releases the weft Y1 while being retracted into the rotary drum 13 (see the phantom line in FIG. 5), and weft insertion is started by the weft insertion nozzle 1. Accordingly, the weft Y1 wound around the rotary drum 13 is sequentially drawn out by the weft insertion nozzle 1 and inserted into the opening of the warp T.

  As shown in FIG. 6, even after the weft locking pin 21 is retracted into the rotary drum 13, the weft Y1 remaining on the rotary drum 13 has a winding resistance with respect to the outer peripheral surface 13A of the rotary drum 13. In parallel with the release of the weft Y1 by the weft insertion nozzle 1, the weft Y1 is continuously drawn out from the yarn supplying section 3 and wound around the rotary drum 13. The winding length of the weft Y1 wound around the rotating drum 13 before the weft locking pin 21 moves back into the rotating drum 13, and the weft Y1 wound around the rotating drum 13 after the weft locking pin 21 moves back into the rotating drum 13. The timing at which the weft locking pin 21 is retracted into the rotary drum 13 is set so that the total length of the two is equal to the length of one pick (one weft insertion). When the weft Y1 for one pick is inserted by the weft insertion nozzle 1, the weft gripping portion 5 is operated to grip the weft Y1, so that the weft insertion of the weft Y1 is completed.

  Subsequently, as shown in FIG. 7, weft insertion of the weft Y2 is performed. The weft guide lever 16 winds and stores the weft Y2 around the rotary drum 13 before the start of weft insertion of the weft Y2 by the weft insertion nozzle 2, as shown in FIG. That is, the weft Y2 is guided to the outer peripheral surface 13A side of the rotary drum 13 by the weft guide lever 16 being released from the restriction by the solenoid mechanism 34 and is locked to the weft locking pin 21. The cam follower 32 of the weft guide lever 16 is controlled by the cooperative action of the urging force of the spring 35 and the cam 14, whereby the thread presser 33 stabilizes the guide position of the weft Y2 and the weft Y2 by the weft locking pin 21. Can be reliably engaged. Since the mechanism and operation for winding and storing such a weft Y2 are the same as the mechanism and operation for winding and storing the weft Y1 by the weft guide lever 15, detailed description thereof will be omitted.

The first embodiment described above has the following operational effects.
(1) Since the weft yarn guide lever 15 guides the weft yarn Y1 or the weft yarn Y2 to the weft locking pin 21 by the cam mechanism including the cam 14, the cam follower 32, and the spring 35, the operation timing variation in the solenoid mechanism 34 is caused by the weft yarn Y1. Alternatively, there is no influence on the timing of locking the weft Y2 to the weft locking pin 21 or the timing of releasing it from the weft locking pin 21. In particular, since the cam 14 is configured by a combination of the groove cam portion 27, the introduction opening cam portion 28, and the lead-out opening cam portion 29, the plurality of weft guide levers 15 and 16 for the single rotating drum 13 can be more smoothly and It can be operated accurately and can greatly contribute to simplification of the weft storage device. Further, since the movement of the weft guide lever 15 by the cam mechanism is selectively restricted by the solenoid mechanism 34 operated by an electrical command, various weft insertion patterns can be flexibly dealt with.

(2) Since the introduction opening cam portion 28 is provided, the degree of freedom of operation timing of the solenoid mechanism 34 is increased. In addition, since the moving position of the thread presser 33 is stabilized by providing the groove cam portion 27, the weft thread Y1 or the weft thread Y2 dances due to the influence of the vibration of the loom, etc., thereby obstructing the guide to the weft locking pin 21. There is no fear of being disengaged or coming off the weft locking pin 21.
(3) The weft locking pin 21 releases the locking of the wefts Y1 and Y2 before the wefts Y1 and Y2 having a length necessary for one weft insertion are wound around the outer peripheral surface 13A of the rotary drum 13. The sum of the lengths of the wefts Y1 and Y2 wound around the rotary drum 13 before the stop is released and the lengths of the wefts Y1 and Y2 wound around the rotary drum 13 after the locking is released is a weft for one weft insertion. The timing at which the weft locking pin 21 releases the locking of the wefts Y1 and Y2 is set so that the length is Y1 and Y2. Therefore, compared with the case where the weft locking pin 21 is retracted into the rotating drum 13 after the wefts Y1 and Y2 having a length necessary for one weft insertion are wound around the rotating drum 13, the speed is further increased. It will be advantageous.

  The present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.

(1) The cam 14 may be constituted by an open disc cam that does not have the groove cam portion 27 shown in the above embodiment, or may be constituted by a flat cam or a three-dimensional cam other than the disc cam. .
(2) The weft guide levers 15 and 16 can replace the spring 35 with a moving mechanism having a positive drive unit. Further, the form of the weft guide levers 15 and 16 is not limited to the above embodiment as long as it includes the cam follower 32 and the thread presser 33, and various other shapes can be selected.
(3) The restricting portion of the present invention is not limited to the solenoid mechanism 34 that is operated based on an electrical command, and can be implemented by, for example, an air cylinder and an electromagnetic valve that controls the operation thereof.
(4) The weft locking pin 21 is not limited to a mechanically driven configuration, and can be implemented with a configuration that is electrically driven like a solenoid.

(5) The weft locking pin 21 is not limited to a mechanism that moves forward and backward from the inside of the rotating drum 13, but may be a mechanism that is disposed outside the rotating drum 13 and moves forward and backward from the outside of the rotating drum 13. Can be implemented.
(6) In the above embodiment, a loom that wefts two types of wefts Y1 and Y2 is shown. However, the present invention can be carried out in a loom using three or more types of wefts of the same type or different types.
(7) The drive rod 19 can be implemented with an electrically driven configuration.
(8) The weft locking pin 21 may be retracted into the rotary drum 13 after one pick of weft has been stored on the outer peripheral surface 13A of the rotary drum 13.
(9) The present invention can be implemented not only in an air jet loom but also in a loom that wefts a piece of weft, such as a water jet loom, a rapier loom, and a gripper loom.

3, 4 Yarn supply portion 5, 8 Weft gripping portion 13 Rotating drum 13A Outer peripheral surface 14 Cam 15, 16 Weft guide lever 18 Rotating shaft 19 Drive rod 21 Weft locking pin 22 Disc cam 24 Mountain portion 25 Valley portion 26 Roof 27 Groove cam portion 28 Inlet opening cam portion 29 Outlet opening cam portion 30 Vertical lever 31 Horizontal lever 32 Cam follower 33 Thread presser 34 Solenoid mechanism 35 Spring

Claims (4)

A plurality of yarn supplying portions, a single rotating drum, and a weft gripping portion that releases and grips the weft at the start and end of weft insertion, and is disposed on the outer peripheral surface of the rotary drum so as to be able to advance and retract. In the weft accumulating device in the loom for retaining the weft thread on the weft retaining pin and winding it around the rotating drum and storing it,
A plurality of weft guide levers that are movable toward the axis of the rotating drum are disposed outside the rotating drum, and the shaft of the rotating drum is guided so as to guide the weft to the weft locking pin. A cam mechanism for moving the weft guide lever toward the head, and a restricting portion that is provided on each of the plurality of weft guide levers and selectively restricts the movement of the weft guide lever by the cam mechanism based on an electrical command. A weft storage device in a loom characterized by the above.   The restricting portion includes a solenoid mechanism that maintains the position of the weft guide lever away from the rotating drum, and the cam mechanism includes a spring that biases the weft guide lever toward the axis of the rotating drum; A cam provided so as to be rotatable integrally with the rotary drum; and a cam follower that contacts the cam; wherein the cam corresponds to a position of the weft guide lever moved toward the axis of the rotary drum. The weft accumulating device for a loom according to claim 1, further comprising a groove cam portion for maintaining the position of the weft. The cam, wherein the cam follower and the introduction opening cam portion to be introduced into the groove cam portion, the 請 Motomeko 2 you, characterized in that a lead opening cam unit that derives the cam follower from the groove cam portion Weft storage device for looms.   The weft lock pin releases the lock of the weft before the length of the weft is wound around the outer peripheral surface of the rotating drum, and before the lock is released. The weft lock so that the sum of the length of the weft wound around the rotary drum and the length of the weft wound around the rotary drum after the lock is released becomes the length of the weft for one weft insertion. The weft accumulating device in the loom according to any one of claims 1 to 3, wherein the pin sets a timing for releasing the engagement of the weft.

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